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Initial Isolation And Protective Action Distances ( Useful At The Events Of Chemical Spillage )

Sr.No

Name of Chemical

Small Spill (from a large package or from many small packages) Large Spill

(From a small package or small leak from a large package)

First Isolate in all directions (Mts) Then Protect persons in down wind during First Isolate in all Directions (Meters) Then Protect persons downwind during
Day Mtrs. Night Kms. Day Mtrs. Night Kms. Day Kms. Night Kms.
1 Liquid
Ammonia
Anhydrous
Ammonia
30 0.2 95 0.3 0.8
2 Ammonia Solution, with more than 50% Ammonia 30 0.2 60 0.2 0.2 0.3
3 Chlorine 60 0.3 185 0.8 0.8 3.1
4 Ethylene Oxide 60 0.2 125 0.3 0.3 1.0
5 Hydrocyanic acid 60 0.2 185 0.8 0.6 2.7
6 Hydrogen Fluoride 60 0.2 155 0.6 0.5 2.3
7 Hydrogen Chloride 60 0.2 155 0.5 0.5 1.8
8 Fluorine 60 0.2 185 0.8 0.6 2.7
9 LPG 90 0.2 120 0.3 0.5 1.0
10 Naptha/NGL 30 0.1 60 0.2 0.2 0.3
11 Free So3/H2SO4 60 0.2 185 0.8 0.6 2.9
12 Bromine 60 0.3 215 1.0 0.8 3.5
13 EthylMercaptan 60 0.2 125 0.5 0.3 1.3
14 Benzene 50 0.1 100 0.3 0.2 0.6
15 CNG 95 0.3 245 1.3 1.1 4.8
16 HNO3 60 0.2 155 0.5 0.5 1.8
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